Burner-regulating mechanism



I 1,637,179 c. M. FITCH r BURNER naauuvrme imcalmxsu Jul 26. 1927.

Filed Oct. 21,1925

3100112151": Charles J 1 ife v,

Patented July 26, 1927.

UNITED STATES PAT-ENT' OFFICE.

CHARLES a. men, or nzrxnnnn, fIILLiNOIS .aeslenon moi-mans, ROEBUQK AND" 00., or onicneo, ILLINOIS, A conronnrron ornnw YORK.

inunnznsnneumrmeMscnsmsu.

Application filed mm 21, 1926. .Serial No.'63,815.

This invention relates to wickless oil burners and in particular ;to.a regulating mechanism therefor.

The type of oil stove burner known as thewickless burner consists of abowl having a deep annular channel within wh ch the level of oil is variedrto regulate the heightof the flame. Usually the 011 level is varied by raising or lowering the burner bowl with reference to a constant level source, the source andbowl being suitably connected by a communicating Oll supply system-. The invention aims to prov de an improved regulating mechan sm which, in theprecent instance, is applied to the burner to raise and lower the level of the 011 there- 1n. p p

Ordinarily burnersiof this type are regulated by means of a lever or the like and frictional-engagement between the parts 1s depended upon tic-maintain the burner n the desired position of adjustment. This arrangement hasproven unsatisfactory for the reason that it frequently happens that the burner is apt to vary its position through failure of'the sustaining means to withstand shocks and jars with the result that the hei ht ,oftihe burner flame is also varied.

; be primary object of this invention is to provide an improved adjusting means which is readily and conveniently operable to adjust an oil receptacle into adesired position and which-sustains the receptacle insuch position against acc-idental movement, or until the regulating means is positively operated. i v A particular object of the inventioniis to provide adjusti means including a screw providing ace-mined operatlng and sus- 4o taining member.

.In. the accompanyingdrawings thereis illustrated an exemplary embodiment of the invention as applied to the burner showing parts arranged for practical .utilityand chosen for simplicity of construction.

In the drawings Figure 1 illustrates a view in elevation of ,a portion of a stove embodying a wickless oil burner.

Fig. .2 is a side elevation partFly in section of the stove portion shownin ig. 1, lookin from the right toward Fig. l.

i .3 isa view similar. to Fig. 2 but looking om the left toward F ig. 1.

Fig. 4 is a rear View of thedevice of Fi 1 fnthe followingdescription of the invention illustratedinthe drawings, it will be understood that the arrangement oi the parts andthe construction herein illustrated and described isin no way a limitation of the invention to :the precise disclosure. Those skilled in the art will readily understand that the invention contemplates changes in construction aswell as other arran ementsof the. parts of the devicein accor once with the spirit and-scope ofvthe invention as expressed in the appended claims.

In the drawings Ihave shown one of the usual group of burners ordinarily independently mounted for up and down movelnent relative to a fixed constantlevel oil' I supply (notshown). The burner bowl 5 in the present instance constitutes the oil chamber or receptacle which is raised and lowered. This burner bowl has the usual annular channel 6 and iscarried by a suit able mountin means such as a bracket 7 vertically adgustable with referenceto the stove body, a portion of which is shown at 8-in the form of a front plate. A common fuel supply pipe .9 from the oil source carries ,for eachburner an oil riser 10 which is preferablywelded to theinainpipe 9, as shown at 11 to form a smooth and tight joint. v

The burnerbowl 5 carries a fuel pipe 12 whichrtelescopes intothe riser 10-through a Stu-fling box 13. Anyother and equivalent connection maybe employed vbut the telescoping connection is preferred since it forms. a rigid slidable connection which furnishes certain degree of lateral support for the burner bowl and constitutes in part the mounting means for the burner.

Extending rearwardly from the front plate 8 is abracket member 14 securedby Tighten 'ular cars 15 to the front plate. Top and otto n flanges 16 are providedcon the plate member '14 through which the oil riser 10 extends to produce rigidity T -he IiserlO ispreferabl' fixed to-thetopmost of the flanges 16 by nuts 17-engaging threads :18;;ahead-of the not of the stuffing box 13.

-In -.addition;to the support furnished the burner by the telescoping oil connections, a

a Mum provide means scribed, the bolt and slot serving to limit the range of the vertical motion.

To produce verticalmotion and to hold the bowl in any vertical positionchosen, I

including in the present instance. a worm or screw havin an operating handlelocated forwardly of tie frontplate and operatively associated with the burner so that in the rotation of the screw the burner will be raised or lowered. The threads of the screw in cooperation with a second or thread engaging member serve to lock the parts against displacement except by rotation of the screw,

More specifically, there is provided on the bracket 14a mounting means for a rotatable screw. The means in the present instance comprisesspaced U-shaped lugs 21 having upwardly opening recesses 22 into which ascrew shaft 23 is placed, the shaft extendingfthrough a hole 24 in the stove body, and being provided with an operating knob 25 at the end". In the present instance the recessed lugs 21 serve as bearings for the screw shaft and alsoas means to hold the shaft against longitudinal sliding by the provision ofa reduced portion 26 at one end of the shaft'forming a shoulder 27. which abuts one lug 21, and by the provision of an enlarged threaded portion forming a worm screw QSWlIlCll abuts the other lug.

Various motion transmitting means may beprovided between the rotatable screw and the vertically movable structure. Prefer ably a swinging member is included in this means to impart vertical motion to the burner. This is accomplished through an arm 29 pivoted at 30 to swing in a vertical plane. The arm 29 preferably engages with the plate 7 carryin the burner by a slot and pin connection. nthe present instancea slot 31 is provided in the arm 29 and the pin of this'connection is furnished by the head end of the bolt of the aforesaid nutand bolt structure 20, the other end of which bolt rides in the slot 19.

In the present instance where the screw threaded member is axially fixed between the lugs 21, a movable thread en aging memher is provided to mesh with t e screw 28. This takesthe form as shown in the drawings of a second swinging member having a projecting portion such as the teeth 32 which mesh with the threads of the screw, the structure constitutinga gear segment 33 whichis mounted 'to swing in a vertical plane. Tosimplify the structure thetwo swinging members 29 and 33 aremade integral and swing on the common pivot 30. Theyithus constitute a structurewhich is in effect a bell crank.

For the convenience of the operator in adjusting. the position of the burner bowl,

an arrow 3 tis formed onthe frame and an indicator 35 is em loyed in the form of a plate bearing suita le legends as shown in Fig. 1.

structure hereinabove described Jermits of a minimum number of parts an the shaft 23 is merely dropped inplace in the half bearings of recesses 22 and the gear segment 33 positioned over the screw 28 to lock the shaft in its fixed position in the bearings. 1

In operating the burner described, one merely grasps the knob 25 and turns it to the right or left to raise or lower the burner. The worm 28 turns the bell crank comprising gear segment 33 and the arm 29so that the end of the arm has a substantially vertical'motion transmitted"through the slot of. economy in manufacture. The 1"ecess-bearmgs 21 also permit ease in assembly since and pin connection to the uprightsupport Thus the upright support 7 and the burner bowl are raiscdor lowered in a truly vertical plane, being'guided'in part in the motion by the telescoping oil pipes and the adjacent plates 7 and 14. Itis clear that no amount of pressure on the bowl or on the gear segment will cause displacement of the bowl without an accompanying rotation of the screw adjusting shaft 22. i f

This structure is more advantageous than the lever structures ordinarily employed because by the provision of a rotatable adjusting member, the latter is less subject to accidental displacement than such'a lever. Furthermore the knob 25 which is grasped by the operators hand may always be found in'the same location irrespective of its de gree of angularity, thus enabling the operator to quickly and readily adjust the burner at all times. 1

While the device has been described particularly with reference to burners, it is to be understood that the principles of construction are equally applicableto other oil containers and furthermore that thehori- 'to and carried by the bowl telescoping with the vertical supply pipe, a vertically movable support. for the bowl, a Pl OtGCl arm having a pin and slot connection with said support, a shaft rotatable in the stove body, a worm on said shaft, and a worm-wheel segment for said bowl, guiding means for the vertical movement of said support and bowl, a rotatable shaft axially fixed in the stove body, a worm on said shaft, and a bell crank pivoted to the stove body, one arm of the bell crank having teeth forming a gear segment meshing with the worm, and the other arm having a sliding and positive connection with said support whereby swinging of the arm moves the support vertically.

3. In a wickless oil stove, in combination, a frame, an oil container adapted to be positioned to change the level of the oil therein to regulate a flame, a support for said oil container adapted for vertical movement relative to the frame, a communicating oil pipe connected to said container, said pipe being adapted to permit vertical adjustment of the container, a lever pivoted on said frame having a substantially horizontal arm, and a connection between said arm and said support whereby swinging of the lever raises and lowers the support, a rotary shaft axially fixed in said frame, a worm rigid on said shaft, and a gear segment meshing with said screw and arranged to move said lever.

4. A wickless oil burner comprising, in combination, a burner bowl, a vertically movable mounting plate therefor, telescoping oil supply pipes to said bowl, a fixed vertical bracket plate, said two plates being relatively slidable in faced relation to each other, a rotary shaft, bearing members projecting from said bracket plate, a shaft axially fixed in said bearing members, a screw on said shaft, a gear segment pivoted to said bracket plate to mesh with said screw, an arm rigid with said segment overlying said mounting plate, and a pin passing through said mounting plate, said arm having a radial slot and said bracket plate having a vertical slot therein for said pin.

5. In a burner regulating mechanism, a bracket plate, spaced hooked or half bearings on said plate, a shaft set into said bearings, a screw portion on said shaft between said bearings, and a gear segment meshing with said screw and pivoted to said plate in position to hold said shaft fixed in said bearings.

6. A wickless oil burner comprising, in combination, a burner bowl, means communicating with said bowl for the supply of oil thereto, a support for said bowl, said support being movable vertically for the adjustable positioning of said bowl, a pivoted lever having operative connection with said support, and a rotatable screw member having operative connection with said lever whereby the rotation of said screw member effects the raising and lowering of said support.

7. A level regulating mechanism for fuel oil burners comprising, in combination, an oil receptacle, an adjustable support for said receptacle, means for guiding the adjusting movement of said support in a vertical path, a pivoted lever having operative connection with said support, a rotatable member having a screw threaded portion, and another member in cooperative engagement with said screw threaded portion, one of said members having operative connection with said lever whereby the rotation of said rotatable member effects the raising and lowering of said support.

In testimony whereof, I have hereunto affixed my signature.

CHARLES M. FITCH. 

